Monolithic Mesh-Type Fe-Pd/γ-Al2O3/Al Bifunctional Catalysts for Electro-Fenton Degradation of Rhodamine B
Open Access
- 1 January 2021
- journal article
- research article
- Published by Scientific Research Publishing, Inc. in Modern Research in Catalysis
- Vol. 10 (02), 56-72
- https://doi.org/10.4236/mrc.2021.102004
Abstract
A novel Fe-Pd bifunctional catalyst supported on mesh-type γ-Al2O3/Al was prepared and applied in the degradation of Rhodamine B (RhB). The monolithic mesh-type Fe-Pd/γ-Al2O3/Al bifunctional catalyst could be separated from the solution directly and could synthesize H2O2 in situ. The characterization results showed that Fe could improve the dispersion of Pd0, and the electronic interactions between Pd and Fe could increase the Pd0 contents on the catalyst, which increased the productivity of H2O2. Furthermore, DFT calculations proved that the addition of Fe could inhibit the dissociation of O2 and promote the nondissociative hydrogenation of O2 on the surface of Fe-Pd/γ-Al2O3/Al, which resulted in the increasement of H2O2 selectivity. Finally, the in-situ synthesized H2O2 by Pd was furtherly decomposed in situ by Fe to generateOH radicals to degrade organic pollutants. Therefore, Fe-Pd/ γ-Al2O3/Al catalysts exhibited excellent catalytic activity in the in-situ synthesis of H2O2 and the degradation of RhB due to the synergistic effects between Pd and Fe on the catalyst. It provided a new idea for the design of bifunctional electro-Fenton catalysts. Ten cycles of experiments showed that the catalytic activity of Fe-Pd/γ-Al2O3/Al catalyst could be maintained for a long time.Keywords
This publication has 36 references indexed in Scilit:
- Density functional theory study of direct synthesis of H2O2 from H2 and O2 on Pd(111), Pd(100), and Pd(110) surfacesChinese Journal of Catalysis, 2013
- Theoretical Revisit of the Direct Synthesis of H2O2 on Pd and Au@Pd Surfaces: A Comprehensive Mechanistic StudyThe Journal of Physical Chemistry C, 2011
- Pd-Catalytic In Situ Generation of H2O2 from H2 and O2 Produced by Water Electrolysis for the Efficient Electro-Fenton Degradation of Rhodamine BEnvironmental Science & Technology, 2011
- Hydrogen substitutes for the in situ generation of H2O2: An application in the Fenton reactionJournal of Hazardous Materials, 2011
- Direct synthesis of hydrogen peroxide on palladium catalyst supported on sulfonic acid-functionalized silicaGreen Chemistry, 2010
- Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton’s Reaction ChemistryChemical Reviews, 2009
- Generalized Gradient Approximation Made SimplePhysical Review Letters, 1996
- Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis setComputational Materials Science, 1996
- Spectrophotometric determination of hydrogen peroxide using potassium titanium(IV) oxalateThe Analyst, 1980
- Special points for Brillouin-zone integrationsPhysical Review B, 1977